Beam antenna



y 1959 s. H. BYQUIST A 2,897,498

BEAM ANTENNA Filed Aug. 12, 1957 INVENTOR. .Slan/ey H- yquisf arrow/var Unite BEAM ANTENNA Stanley H. Byquist, Salina, Kans., assignor of nine-tenths to E. W. Freeman, Yankton, S. Dak.

Application August 12, 1957, Serial No. 677,613

3 Claims. (Cl. 343-834) My invention relates to a beam antenna.

An object of my invention is to provide a highly eflicient antenna for radio or similar purposes which is directional, and which will include a variety of advantages which will be explained later.

With these and other objects in view, my invention 3 Figure 6 is a diagram of the electrical circuit and antenna.

In describing my invention, I have used the character 10 to designate a wooden pole which rotates at 11 within the antenna support 12, the pole 10 being round at this portion, the pole also being round at its upper portion 13. The balance of the pole is usually square in cross sec-'- tion as shown in Figure 5, and at these square portions I provide a lower variable inductance coil 14 which is wound upon the insulating cylinder 15, which cylinder is suitably affixed to the square pole as shown, the coil 14 being adjustably regulated by means of the slide member 16 which travels along the vertical conducting rod 17 which is suitably affixed to the pole or mast as shown.

I have also used the character 18 to indicate a bifilar coil, this coil being of that type having a pair of sideby-side windings passing helically about the insulating cylinder 19, this bifilar coil being shown in Figure 6, and although the coils are shown separate for clarity, they actually will pass about the cylinder as insulated twin wires.

The circular portions 10 and 13 are tightly secured in upper and lower openings 20 which are provided in the square plastic insulating plates 21, which plates 21 are rigidly secured by any suitable methods to the transverse vertically spaced insulating bars 22 and 23.

Passing through the bars 22 and 23 are the conductor or grid elements 24 and 25, which include the vertically positioned horizontally spaced integral portions 26 joined by the integral portions 27, these nespective grid structures being connected into the circuit by means of the leads 28 as is clearly shown in Figure 6, and passing through the bars 23 is a similar grid structure including the vertically positioned elements 29, which structure however is continuous throughout and which is indicated generally by the character 30 in Figure 6, the component parts of this grid acting as reflectors to the front elements and being of the same configuration as the front grid.

The rear reflector grid 30 is connected to one side of a coaxial cable indicated by the character 31 (see Figure 2,8914% Patented July 28, 1959 i 6) and the other side of this coaxial cable is connected desired manner and is clearly shown in the wiring diagram of Figure 6.

If desired, the elements such as 26 can be supported by means of the machine screws 32 which engage the bars 22 and 23, which screws are tightened against the elements 26, and also if desired the various joints such as 33.can be provided to interconnect the various vertical portions to provide an easier assembly.

I have found that the above described antenna includes a variety of advantages, as follows.

It provides a general purpose flexible frequency coverage receiving and transmitting type antenna.

This antenna eliminates the need for long wires, trailing wires, doublet-type antennas and other cumbersome arrangements.

The antenna provides a better control of resonance or directivity since it is not cumbersome, is easy to rotate, and allows convenient change characteristics from the cut and laid out position on the ground to the hoisted pole supported position, principally due to the fact that this antenna can be made very small in comparison to the more cumbersome sizes which are very much larger.

This antenna involves a size reduction of better than to 1, has a broad band frequency coverage and provides a complete control of all requirements due to its 0 mechanical design, permitting complete control in all respects at the mounted or used location.

The design can be made completely resonant at any frequency, and inherently has broad band coverage from a few kilocycles to infinity.

The antenna also provides for easier stacking due principally to its reduced size.

This type of antenna also permits complete control of the antenna due to a reduced size, and frequency broadband characteristics.

The antenna is relatively small, rugged, is light in weight, and has over-all hand control, and also provides features which will be readily apparent.

It will now be seen that I have provided the advantages mentioned above.

Some changes may be made in the construction and arrangement of the parts of my invention without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim as my invention:

1. A beam antenna comprising a front grid and a rear reflector grid, said grids being substantially of the same configuration and including vertically positioned horizontally spaced parallel integral elements, said grids being horizontally spaced and substantially parallel to each other, said front grid including a pair of grid portions, said antenna including a bifilar coil, each of said grid portions being electrically connected to each component winding of said bifilar coil, a variable inductance coil connected to the closed portion of said bifilar coil, a coaxial cable, one of the leads of said coaxial cable being connected to said variable inductance coil, the other lead of said coaxial cable being connected medially to the rear reflector grid.

2. A beam antenna comprising a front grid and a rear reflector grid, said grids being substantially of the same configuration and including vertically positioned horizontally spaced parallel integral elements, said grids being horizontally spaced and substantially parallel to each other, said front grid including a pair of grid portions, said antenna including a bifilar coil, each of said grid portions being. electrically connected to'each component Winding of said bifilar coil, a variableinductance coil connected to the closed portion of said bifilar coil, a coaxial cable, one of the leads of said coaxial cable being connected to said v variable inductance coil, the other lead of said coaxial cable being connected medially, to,

the, rear reflector, grid, horizontally positioned insulating bars-receiving said gridelements and supporting the same vertically spaced insulating plates attached to said bars, a; rotatable mast-attached to said plates, said coilslreceiYing said mast;-

3; Axbeam antennacomprising a front grid and a rear grid, said grids-including alternately reversely bent pore tions, said-portions being horizontally spaced and sub- 4 stantially parallel to each other, said front grid and said rear grid beinglocated in planes parallel to each other, said front grid including a pair of grid portions, said antenna including a bifilar coil, each of said grid portions being electrically connected to each component winding of said bifilar coil, a variable inductance coil connected to the closed portion of said biiilar coil, a coaxial cable, one of the leads of said coaxial; cable being connected to said variable inductance coil, the other lead of said 10 coaxial cable being connected medially to the rear grid.

141,057 Australia May 3, 1951 

